Which of the following quantity has unit volt-metre (Vm)?

The correct answer is Option (1) → Electric flux

Electric flux is the electric field multiplied by the area it crosses, \( \phi = EA\cos\theta \). The unit of E is \( \mathrm{V\,m^{-1}} \) and that of area is \( \mathrm{m^{2}} \).

    \( [\phi] = \mathrm{V\,m^{-1}}\times\mathrm{m^{2}} = \mathrm{V\,m} \)

The other quantities have different units: the field is \( \mathrm{V\,m^{-1}} \), the dipole moment is \( \mathrm{C\,m} \), and the potential energy is \( \mathrm{J} = \mathrm{C\,V} \).

NCERT (2026-27):
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